Before you decide to begin using the copper peptide, GHK Cu, be aware it stings and leaves behind big, red welts that then leave a lovely bruise. , In order to reap the glow benefits, you need to Dongkook Pharmaceutical Launches "Madeca Liposome Glutathione Film" with Enhanced Absorption The Asia Business Daily Dermafirm Glutathione Brightening Range Mist Ampoule & Melting Film COCOMO Two Weeks on GHK CU by Rory Uphold The Ladies Room 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK